[TriEmbed] Is anyone here a JST Connector Wizard

[Trampas Stern]

Rick,

I do quite a few JST crimps and here is what I found works best for me.
Note I have tried every crimper I could find, the engineering ones and
others.  I found the process of setting up the terminals to be the key to
success. It is not a fast process but I have had good results.

I use this crimper, but many are the same:
[image: image.png]

Then I prepare the terminal, first cut off the leader near the terminal to
be used:
[image: image.png]

Bend the terminal to be crimped 90 degrees as shown below:
[image: image.png]

Insert into the crimper and close as shown, these crimpers lock in this
position and often the insulation wings are a bit wide and I have to
squeeze them before installing in the crimper.
[image: image.png]
Then I insert the stripped wire.
[image: image.png]

After the crimp I break the terminal and wire from the leader, while doing
a pull test.
[image: image.png]


Trampas



On Wed, Jun 26, 2024 at 5:37 PM Rick DeNatale via TriEmbed <
triembed at triembed.org> wrote:

> I’m convinced that these things are the invention of the devil!
>
> Despite my best efforts, I’d guess i have about a 20% yield crimping JST
> terminals.
>
> I’ve bought several crimping tools.
> https://www.amazon.com/gp/product/B01N4L8QMW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
>  and
> https://www.amazon.com/gp/product/B078WNZ9FW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 were
> recommended by various YouTube videos.
>
> The second one works a bit better unlike the first it has you crimp the
> electrical contact first and then the mechanical crimp around the
> insulation.
>
> My big problem is that the insulation crimp often doesn’t form correctly.
> Instead of wrapping around the insulation the wings just stick out straight.
>
> Then either the terminal comes off the wire while removing the “tape”
> part, or when trying to to insert the terminal in the plastic shell.
>
> Is my problem with the terminals? I’ve been buying kits from Amazon. Would
> i be better off with a different vendor like Digikey?
>
> Any advice gladly appreciated.
>
> ——
> Rick DeNatale
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